Which of the following pairs of variables are likely to be negatively correlated?
A) room size and time required to paint walls
B) amount of studying and test grade
C) value of a collectable item and the number of those items known to exist
D) ocean temperature and the number of people at the beach

Question

Quizplus · Accepted Answer

The value of a collectable item and the number of those items known to exist are likely to be negatively correlated because as the rarity (or scarcity) of an item increases (meaning fewer items exist), its value tends to increase. Conversely, if more of the item are known to exist, its value typically decreases due to being less rare.

Which of the Following Pairs of Variables Are Likely to Be